Subject	DYNO DAY: DOOLZ vs. JWT Dual-POP. Detailz inside >>>
Posted by	AshsZ of Z1Motorsports.com on September 13, 2003 at 5:57 PM
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Message	Went to the dyno today. Had lots of fun. Car details: Wiseco forged pistons 87.5mm Stock heads and valvetrain Stock exhaust manifolds, non-ported JWT Sport 600's 555cc injectors Pump fuel Automatic transmission (which explains why there is chickenscratch at the beginning of the pulls) The car was maxing out at 18-19psi and wouldn't squeeze any more. There were 8 pulls made today, starting at run #8 (we have dyno'd this car before) and it went to 15. The pulls of greatest interest are shown below. The car was fitted with the JWT dual-pop to start with and on the 11th run it had been switched over to the DOOLZ. No program changes were made for the switch. A few minutes between the two consecutive pulls was observed so as to equalize the field in terms of heatsoak. Run #12 is not shown because the ignition pickup stopped sensing around 5500RPM. Three pulls were made with the DOOLZ in quick time and the DOOLZ setup consistently produced more power than the JWT counterpart. Here are the results: Run #9 and #10 were with the Dual-POP and #11 and #13 were with the DOOLZ. A/F and boost were ~11.5:1 - ~17.5psi, JWT being slightly richer by about 0.2-0.5max A/F. If you are interested in the DOOLZ, you can snatch a set of your own up here. The price has been adjusted for a limited time as well! [ http://twinturbo.net/net/viewmsg.aspx?forum=classified&msg_id=56137 ] Here's the link on Z1's website; [ http://z1motorsports.com/Products/Powerplant%20Performance/DOOLZ/doolz.asp ] I honestly wasn't expecting to see any notable difference between the two and I will be revisiting this dyno-challenge again very soon with another vehicle for extra peace of mind. But to say the least, the DOOLZ definately is not making less power than the Dual-POP. There have been questions about having the shared area being of slightly less cross sectional area compared to the dual-pop's completely split design but it is appearing that my theory about the greatest point of restriction in the intake setup is the compressor inlet itself once the restriction from a single filter is overcome. The gains are likely more a product of the smoother path that the air takes when entering the stock pipes just after the intake setups.. The JWT dual-pop has a very sharp angle leading into the stock pipes whereas the DOOLZ has a much smoother arc in its design. [ ashleypowers.com ] [ agpowers@bellsouth.net ] [ Zemulator Information Sheet ] [ Z1 Motorsports Website ] Enthusiasts soon understand each other. --W. Irving. Are you an enthusiast?
Follow Ups	DYNO DAY: DOOLZ vs. JWT Dual-POP. Detailz inside >>> - AshsZ of Z1Motorsports.com 17:57:19 09/13/03 How much room do the doolz take up vs the JWT? - Thrash 18:03:50 09/13/03 They are pretty similar. BTW, they fit with APEXi BOVs too. - AshsZ of Z1Motorsports.com 18:07:49 09/13/03 Solid ~15rwhp/tq increase. Very nice. - SeedyROM 18:14:33 09/13/03 Why the dummy MAF sensor? If the second one is not - JMT-Z(St. Louis) 18:20:50 09/13/03 Its part of the design. Equalization is the key. - AshsZ of Z1Motorsports.com 18:23:31 09/13/03 But if they equalize in the middle why should that make a - JMT-Z(St. Louis) 19:15:05 09/13/03 That's a hard question to answer because I'm not sure - AshsZ of Z1Motorsports.com 19:36:18 09/13/03 so what happens when... - TARGETZ 19:49:17 09/13/03 Seems like the answer would be obvious from one asking - AshsZ of Z1Motorsports.com 19:52:12 09/13/03 thats why I want to run dual MAS sensors - TARGETZ 19:54:13 09/13/03 Go for it. Spend all that hard earned money on going way - AshsZ of Z1Motorsports.com 19:57:14 09/13/03 but dual MAF's have a built in safety factor - Janders 21:05:44 09/13/03 2 MAF's are definitely a safer bet - Janders 21:06:43 09/13/03 MAF side plugged=Lean, Dummy side plugged=rich - Janders 21:02:43 09/13/03 how long were the JWT filters used beforehand? switching - Bernie (OOParts International) 19:07:44 09/13/03 LOL...the age old Vacuum trick-----> - Kyle(Houston) 22:21:03 09/13/03 LOL, I have an uncle that sold them...said the exact same - SeedyROM 01:16:38 09/14/03 very nice results - RaBBiZ(philly) 19:17:15 09/13/03 nice results ash ! (n/m) - Chris(NJ) 20:11:01 09/13/03 UNRELATED Q:isn't the hp and the torque low for 600's? (n/m) - Slowninja(Delaware) 20:11:23 09/13/03 Definately. It was on pump fuel and only hitting 18psi. - AshsZ of Z1Motorsports.com 20:15:20 09/13/03 hey dude... - Spee 20:38:59 09/13/03 no problem (n/m) - Slowninja(Delaware) 10:58:27 09/14/03 Sweet, I want one .... - RegalZ 20:16:58 09/13/03 Well, Sorry Lorca. I'm not building them with the same flaw - AshsZ of Z1Motorsports.com 20:24:25 09/13/03 I guess I'll consider it then but I do live in So Fla and - RegalZ 22:15:24 09/13/03 my Q is - felixx23 (DFW) 20:27:43 09/13/03 I didn't use a JWT ECU mainly because it would have been - AshsZ of Z1Motorsports.com 20:35:44 09/13/03 thanks for the info ash - felixx23 (DFW) 20:50:34 09/13/03 impressive (n/m) - Spee 20:38:22 09/13/03 Can you measure both exhausts for a/f ratio? - Ozone240 21:48:40 09/13/03 If you have EGTS on both sides they should be almost dead - MikeH(Twin GT35BB Incon Z) 22:19:03 09/13/03 Just for 'fun's sake' I'd like to see the following - Janders 22:59:45 09/13/03 Those are good significant results from just switching - MikeH(Twin GT35BB Incon Z) 22:17:35 09/13/03 You suck at the internet----> - Kyle(Houston) 22:23:26 09/13/03 Thanks for your critique. I just read that after - MikeH(Twin GT35BB Incon Z) 22:27:15 09/13/03 now that is how you do a comparison(SP). nice job (n/m) - Halo Z 02:24:19 09/14/03 As long as they cleaned the JWT filters ;) - SeedyROM 02:34:25 09/14/03 looks alot nicer but it would have to be a good amount of - Jimiz91 05:20:31 09/14/03
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